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118 lines
4.3 KiB
EmacsLisp
118 lines
4.3 KiB
EmacsLisp
;;; autoarg.el --- make digit keys supply prefix args
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;; Copyright (C) 1998 Free Software Foundation, Inc.
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;; Author: Dave Love <fx@gnu.org>
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;; Created: 1998-09-04
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;; Keywords: abbrev, emulations
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This provides `autoarg-mode', a global minor mode meant to emulate
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;; a facility reported from Twenex Emacs whereby digit keys supplied
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;; prefix args rather than self inserting, with a digit sequence
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;; terminated by space acting to insert the digits.
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;; The bindings of DIGIT and C-DIGIT are swapped and a command bound
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;; to SPC deals with a numeric prefix arg or acts normally without
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;; such an arg. (In the absence of a suitable terminal, you'd
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;; probably want to swap DIGIT and M-DIGIT.) See the mode doc.
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;; You probably don't really want to use this.
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;;; Code:
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;;;###autoload
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(defcustom autoarg-mode nil
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"Toggle Autoarg mode.
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You must modify via \\[customize] for this variable to have an effect."
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:set (lambda (symbol value) (autoarg-mode (or value 0)))
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:initialize 'custom-initialize-default
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:type 'boolean
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:group 'editing
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:require 'autoarg)
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;; If you wanted a local mode:
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;; (make-variable-buffer-local 'autoarg-mode)
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(defvar autoarg-mode-map (make-sparse-keymap)
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"Keymap for Autoarg Mode.")
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;; Loop over digit characters to set up keymap.
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(let ((i ?0))
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(while (<= i ?9)
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(define-key autoarg-mode-map `[,i] 'digit-argument)
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(define-key autoarg-mode-map `[(control ,i)] 'self-insert-command)
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(setq i (1+ i))))
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(define-key autoarg-mode-map " " 'autoarg-terminate)
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;; Logical additions:
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;; (define-key autoarg-mode-map [?-] 'negative-argument)
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;; (define-key autoarg-mode-map [(control ?-)] 'self-insert-command)
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;; A sensible/addition?
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;; (define-key autoarg-mode-map [?\r] 'autoarg-terminate)
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;;;###autoload
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(defun autoarg-mode (&optional arg)
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"Toggle Autoarg mode minor mode globally.
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With ARG, turn Autoarg mode on if ARG is positive, off otherwise.
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\\<autoarg-mode-map>
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In Autoarg mode digits are bound to `digit-argument' -- i.e. they
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supply prefix arguments as C-DIGIT and M-DIGIT normally do -- and
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C-DIGIT inserts DIGIT. \\[autoarg-terminate] terminates the prefix sequence
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and inserts the digits of the autoarg sequence into the buffer.
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Without a numeric prefix arg the normal binding of \\[autoarg-terminate] is
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invoked, i.e. what it would be with Autoarg mode off.
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For example:
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`6 9 \\[autoarg-terminate]' inserts `69' into the buffer, as does `C-6 C-9'.
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`6 9 a' inserts 69 `a's into the buffer.
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`6 9 \\[autoarg-terminate] \\[autoarg-terminate]' inserts `69' into the buffer and
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then invokes the normal binding of \\[autoarg-terminate].
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`C-u \\[autoarg-terminate]' invokes the normal binding of \\[autoarg-terminate] four times.
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\\{autoarg-mode-map}"
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(interactive "P")
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(let ((old-mode autoarg-mode))
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(setq autoarg-mode (if (null arg)
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(not autoarg-mode)
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(> (prefix-numeric-value arg) 0))))
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(if (interactive-p)
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(message "Autoarg mode %sabled" (if autoarg-mode "en" "dis"))))
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(add-to-list 'minor-mode-alist '(autoarg-mode " Aarg"))
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(add-to-list 'minor-mode-map-alist (cons 'autoarg-mode autoarg-mode-map))
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(defun autoarg-terminate (n)
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"Maybe terminate a digit prefix sequence.
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With a non-negative numeric prefix arg, insert the digits comprising
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the arg into the current buffer. Otherwise use the binding of the key
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which invoked this function, excluding the Autoarg keymap."
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(interactive "P")
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(if (numberp n)
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(insert (number-to-string n))
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(let* ((autoarg-mode nil) ; hide the bindings
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(binding (key-binding (this-single-command-keys))))
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(if binding (call-interactively binding)))))
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(provide 'autoarg)
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;;; autoarg.el ends here
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